[net-next-2.6.git] / fs / gfs2 / incore.h

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License v.2.
 */

#ifndef __INCORE_DOT_H__
#define __INCORE_DOT_H__

#define DIO_FORCE	0x00000001
#define DIO_CLEAN	0x00000002
#define DIO_DIRTY	0x00000004
#define DIO_START	0x00000008
#define DIO_WAIT	0x00000010
#define DIO_METADATA	0x00000020
#define DIO_DATA	0x00000040
#define DIO_RELEASE	0x00000080
#define DIO_ALL		0x00000100

struct gfs2_log_operations;
struct gfs2_log_element;
struct gfs2_bitmap;
struct gfs2_rgrpd;
struct gfs2_bufdata;
struct gfs2_glock_operations;
struct gfs2_holder;
struct gfs2_glock;
struct gfs2_alloc;
struct gfs2_inode;
struct gfs2_file;
struct gfs2_revoke;
struct gfs2_revoke_replay;
struct gfs2_unlinked;
struct gfs2_quota_data;
struct gfs2_log_buf;
struct gfs2_trans;
struct gfs2_ail;
struct gfs2_jdesc;
struct gfs2_args;
struct gfs2_tune;
struct gfs2_gl_hash_bucket;
struct gfs2_sbd;

typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);

/*
 * Structure of operations that are associated with each
 * type of element in the log.
 */

struct gfs2_log_operations {
	void (*lo_add) (struct gfs2_sbd *sdp, struct gfs2_log_element *le);
	void (*lo_incore_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);
	void (*lo_before_commit) (struct gfs2_sbd *sdp);
	void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
	void (*lo_before_scan) (struct gfs2_jdesc *jd,
				struct gfs2_log_header *head, int pass);
	int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
				 struct gfs2_log_descriptor *ld, __be64 *ptr,
				 int pass);
	void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);
	char *lo_name;
};

struct gfs2_log_element {
	struct list_head le_list;
	struct gfs2_log_operations *le_ops;
};

struct gfs2_bitmap {
	struct buffer_head *bi_bh;
	char *bi_clone;
	uint32_t bi_offset;
	uint32_t bi_start;
	uint32_t bi_len;
};

struct gfs2_rgrpd {
	struct list_head rd_list;	/* Link with superblock */
	struct list_head rd_list_mru;
	struct list_head rd_recent;	/* Recently used rgrps */
	struct gfs2_glock *rd_gl;	/* Glock for this rgrp */
	struct gfs2_rindex rd_ri;
	struct gfs2_rgrp rd_rg;
	uint64_t rd_rg_vn;
	struct gfs2_bitmap *rd_bits;
	unsigned int rd_bh_count;
	struct mutex rd_mutex;
	uint32_t rd_free_clone;
	struct gfs2_log_element rd_le;
	uint32_t rd_last_alloc_data;
	uint32_t rd_last_alloc_meta;
	struct gfs2_sbd *rd_sbd;
};

enum gfs2_state_bits {
	BH_Pinned = BH_PrivateStart,
	BH_Escaped = BH_PrivateStart + 1,
};

BUFFER_FNS(Pinned, pinned)
TAS_BUFFER_FNS(Pinned, pinned)
BUFFER_FNS(Escaped, escaped)
TAS_BUFFER_FNS(Escaped, escaped)

struct gfs2_bufdata {
	struct buffer_head *bd_bh;
	struct gfs2_glock *bd_gl;

	struct list_head bd_list_tr;
	struct gfs2_log_element bd_le;

	struct gfs2_ail *bd_ail;
	struct list_head bd_ail_st_list;
	struct list_head bd_ail_gl_list;
};

struct gfs2_glock_operations {
	void (*go_xmote_th) (struct gfs2_glock * gl, unsigned int state,
			     int flags);
	void (*go_xmote_bh) (struct gfs2_glock * gl);
	void (*go_drop_th) (struct gfs2_glock * gl);
	void (*go_drop_bh) (struct gfs2_glock * gl);
	void (*go_sync) (struct gfs2_glock * gl, int flags);
	void (*go_inval) (struct gfs2_glock * gl, int flags);
	int (*go_demote_ok) (struct gfs2_glock * gl);
	int (*go_lock) (struct gfs2_holder * gh);
	void (*go_unlock) (struct gfs2_holder * gh);
	void (*go_callback) (struct gfs2_glock * gl, unsigned int state);
	void (*go_greedy) (struct gfs2_glock * gl);
	int go_type;
};

enum {
	/* Actions */
	HIF_MUTEX		= 0,
	HIF_PROMOTE		= 1,
	HIF_DEMOTE		= 2,
	HIF_GREEDY		= 3,

	/* States */
	HIF_ALLOCED		= 4,
	HIF_DEALLOC		= 5,
	HIF_HOLDER		= 6,
	HIF_FIRST		= 7,
	HIF_RECURSE		= 8,
	HIF_ABORTED		= 9,
};

struct gfs2_holder {
	struct list_head gh_list;

	struct gfs2_glock *gh_gl;
	struct task_struct *gh_owner;
	unsigned int gh_state;
	int gh_flags;

	int gh_error;
	unsigned long gh_iflags;
	struct completion gh_wait;
};

enum {
	GLF_PLUG		= 0,
	GLF_LOCK		= 1,
	GLF_STICKY		= 2,
	GLF_PREFETCH		= 3,
	GLF_SYNC		= 4,
	GLF_DIRTY		= 5,
	GLF_SKIP_WAITERS2	= 6,
	GLF_GREEDY		= 7,
};

struct gfs2_glock {
	struct list_head gl_list;
	unsigned long gl_flags;		/* GLF_... */
	struct lm_lockname gl_name;
	struct kref gl_ref;

	spinlock_t gl_spin;

	unsigned int gl_state;
	struct list_head gl_holders;
	struct list_head gl_waiters1;	/* HIF_MUTEX */
	struct list_head gl_waiters2;	/* HIF_DEMOTE, HIF_GREEDY */
	struct list_head gl_waiters3;	/* HIF_PROMOTE */

	struct gfs2_glock_operations *gl_ops;

	struct gfs2_holder *gl_req_gh;
	gfs2_glop_bh_t gl_req_bh;

	lm_lock_t *gl_lock;
	char *gl_lvb;
	atomic_t gl_lvb_count;

	uint64_t gl_vn;
	unsigned long gl_stamp;
	void *gl_object;

	struct gfs2_gl_hash_bucket *gl_bucket;
	struct list_head gl_reclaim;

	struct gfs2_sbd *gl_sbd;

	struct inode *gl_aspace;
	struct gfs2_log_element gl_le;
	struct list_head gl_ail_list;
	atomic_t gl_ail_count;
};

struct gfs2_alloc {
	/* Quota stuff */

	unsigned int al_qd_num;
	struct gfs2_quota_data *al_qd[4];
	struct gfs2_holder al_qd_ghs[4];

	/* Filled in by the caller to gfs2_inplace_reserve() */

	uint32_t al_requested;

	/* Filled in by gfs2_inplace_reserve() */

	char *al_file;
	unsigned int al_line;
	struct gfs2_holder al_ri_gh;
	struct gfs2_holder al_rgd_gh;
	struct gfs2_rgrpd *al_rgd;

	/* Filled in by gfs2_alloc_*() */

	uint32_t al_alloced;
};

enum {
	GIF_MIN_INIT		= 0,
	GIF_QD_LOCKED		= 1,
	GIF_PAGED		= 2,
	GIF_SW_PAGED		= 3,
};

struct gfs2_inode {
	struct gfs2_inum i_num;

	atomic_t i_count;
	unsigned long i_flags;		/* GIF_... */

	uint64_t i_vn;
	struct gfs2_dinode i_di;

	struct gfs2_glock *i_gl;
	struct gfs2_sbd *i_sbd;
	struct inode *i_vnode;

	struct gfs2_holder i_iopen_gh;
	struct gfs2_holder i_gh; /* for prepare/commit_write only */
	struct gfs2_alloc i_alloc;
	uint64_t i_last_rg_alloc;

	spinlock_t i_spin;
	struct rw_semaphore i_rw_mutex;

	unsigned int i_greedy;
	unsigned long i_last_pfault;

	struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
};

enum {
	GFF_DID_DIRECT_ALLOC	= 0,
};

struct gfs2_file {
	unsigned long f_flags;		/* GFF_... */

	struct mutex f_fl_mutex;
	struct gfs2_holder f_fl_gh;

	struct gfs2_inode *f_inode;
	struct file *f_vfile;
};

struct gfs2_revoke {
	struct gfs2_log_element rv_le;
	uint64_t rv_blkno;
};

struct gfs2_revoke_replay {
	struct list_head rr_list;
	uint64_t rr_blkno;
	unsigned int rr_where;
};

enum {
	ULF_LOCKED		= 0,
};

struct gfs2_unlinked {
	struct list_head ul_list;
	unsigned int ul_count;
	struct gfs2_unlinked_tag ul_ut;
	unsigned long ul_flags;		/* ULF_... */
	unsigned int ul_slot;
};

enum {
	QDF_USER		= 0,
	QDF_CHANGE		= 1,
	QDF_LOCKED		= 2,
};

struct gfs2_quota_lvb {
        uint32_t qb_magic;
        uint32_t __pad;
        uint64_t qb_limit;      /* Hard limit of # blocks to alloc */
        uint64_t qb_warn;       /* Warn user when alloc is above this # */
        int64_t qb_value;       /* Current # blocks allocated */
};

struct gfs2_quota_data {
	struct list_head qd_list;
	unsigned int qd_count;

	uint32_t qd_id;
	unsigned long qd_flags;		/* QDF_... */

	int64_t qd_change;
	int64_t qd_change_sync;

	unsigned int qd_slot;
	unsigned int qd_slot_count;

	struct buffer_head *qd_bh;
	struct gfs2_quota_change *qd_bh_qc;
	unsigned int qd_bh_count;

	struct gfs2_glock *qd_gl;
	struct gfs2_quota_lvb qd_qb;

	uint64_t qd_sync_gen;
	unsigned long qd_last_warn;
	unsigned long qd_last_touched;
};

struct gfs2_log_buf {
	struct list_head lb_list;
	struct buffer_head *lb_bh;
	struct buffer_head *lb_real;
};

struct gfs2_trans {
	char *tr_file;
	unsigned int tr_line;

	unsigned int tr_blocks;
	unsigned int tr_revokes;
	unsigned int tr_reserved;

	struct gfs2_holder tr_t_gh;

	int tr_touched;

	unsigned int tr_num_buf;
	unsigned int tr_num_buf_new;
	unsigned int tr_num_buf_rm;
	struct list_head tr_list_buf;

	unsigned int tr_num_revoke;
	unsigned int tr_num_revoke_rm;
};

struct gfs2_ail {
	struct list_head ai_list;

	unsigned int ai_first;
	struct list_head ai_ail1_list;
	struct list_head ai_ail2_list;

	uint64_t ai_sync_gen;
};

struct gfs2_jdesc {
	struct list_head jd_list;

	struct inode *jd_inode;
	unsigned int jd_jid;
	int jd_dirty;

	unsigned int jd_blocks;
};

#define GFS2_GLOCKD_DEFAULT	1
#define GFS2_GLOCKD_MAX		16

#define GFS2_QUOTA_DEFAULT	GFS2_QUOTA_OFF
#define GFS2_QUOTA_OFF		0
#define GFS2_QUOTA_ACCOUNT	1
#define GFS2_QUOTA_ON		2

#define GFS2_DATA_DEFAULT	GFS2_DATA_ORDERED
#define GFS2_DATA_WRITEBACK	1
#define GFS2_DATA_ORDERED	2

struct gfs2_args {
	char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
	char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
	char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
	int ar_spectator; /* Don't get a journal because we're always RO */
	int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
	int ar_localflocks; /* Let the VFS do flock|fcntl locks for us */
	int ar_localcaching; /* Local-style caching (dangerous on multihost) */
	int ar_debug; /* Oops on errors instead of trying to be graceful */
	int ar_upgrade; /* Upgrade ondisk/multihost format */
	unsigned int ar_num_glockd; /* Number of glockd threads */
	int ar_posix_acl; /* Enable posix acls */
	int ar_quota; /* off/account/on */
	int ar_suiddir; /* suiddir support */
	int ar_data; /* ordered/writeback */
};

struct gfs2_tune {
	spinlock_t gt_spin;

	unsigned int gt_ilimit;
	unsigned int gt_ilimit_tries;
	unsigned int gt_ilimit_min;
	unsigned int gt_demote_secs; /* Cache retention for unheld glock */
	unsigned int gt_incore_log_blocks;
	unsigned int gt_log_flush_secs;
	unsigned int gt_jindex_refresh_secs; /* Check for new journal index */

	unsigned int gt_scand_secs;
	unsigned int gt_recoverd_secs;
	unsigned int gt_logd_secs;
	unsigned int gt_quotad_secs;
	unsigned int gt_inoded_secs;

	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
	unsigned int gt_quota_scale_num; /* Numerator */
	unsigned int gt_quota_scale_den; /* Denominator */
	unsigned int gt_quota_cache_secs;
	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
	unsigned int gt_atime_quantum; /* Min secs between atime updates */
	unsigned int gt_new_files_jdata;
	unsigned int gt_new_files_directio;
	unsigned int gt_max_atomic_write; /* Split big writes into this size */
	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
	unsigned int gt_lockdump_size;
	unsigned int gt_stall_secs; /* Detects trouble! */
	unsigned int gt_complain_secs;
	unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
	unsigned int gt_entries_per_readdir;
	unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */
	unsigned int gt_greedy_default;
	unsigned int gt_greedy_quantum;
	unsigned int gt_greedy_max;
	unsigned int gt_statfs_quantum;
	unsigned int gt_statfs_slow;
};

struct gfs2_gl_hash_bucket {
	rwlock_t hb_lock;
	struct list_head hb_list;
};

enum {
	SDF_JOURNAL_CHECKED	= 0,
	SDF_JOURNAL_LIVE	= 1,
	SDF_SHUTDOWN		= 2,
	SDF_NOATIME		= 3,
};

#define GFS2_GL_HASH_SHIFT	13
#define GFS2_GL_HASH_SIZE	(1 << GFS2_GL_HASH_SHIFT)
#define GFS2_GL_HASH_MASK	(GFS2_GL_HASH_SIZE - 1)
#define GFS2_FSNAME_LEN		256

struct gfs2_sbd {
	struct super_block *sd_vfs;
	struct kobject sd_kobj;
	unsigned long sd_flags;	/* SDF_... */
	struct gfs2_sb sd_sb;

	/* Constants computed on mount */

	uint32_t sd_fsb2bb;
	uint32_t sd_fsb2bb_shift;
	uint32_t sd_diptrs;	/* Number of pointers in a dinode */
	uint32_t sd_inptrs;	/* Number of pointers in a indirect block */
	uint32_t sd_jbsize;	/* Size of a journaled data block */
	uint32_t sd_hash_bsize;	/* sizeof(exhash block) */
	uint32_t sd_hash_bsize_shift;
	uint32_t sd_hash_ptrs;	/* Number of pointers in a hash block */
	uint32_t sd_ut_per_block;
	uint32_t sd_qc_per_block;
	uint32_t sd_max_dirres;	/* Max blocks needed to add a directory entry */
	uint32_t sd_max_height;	/* Max height of a file's metadata tree */
	uint64_t sd_heightsize[GFS2_MAX_META_HEIGHT];
	uint32_t sd_max_jheight; /* Max height of journaled file's meta tree */
	uint64_t sd_jheightsize[GFS2_MAX_META_HEIGHT];

	struct gfs2_args sd_args;	/* Mount arguments */
	struct gfs2_tune sd_tune;	/* Filesystem tuning structure */

	/* Lock Stuff */

	struct lm_lockstruct sd_lockstruct;
	struct gfs2_gl_hash_bucket sd_gl_hash[GFS2_GL_HASH_SIZE];
	struct list_head sd_reclaim_list;
	spinlock_t sd_reclaim_lock;
	wait_queue_head_t sd_reclaim_wq;
	atomic_t sd_reclaim_count;
	struct gfs2_holder sd_live_gh;
	struct gfs2_glock *sd_rename_gl;
	struct gfs2_glock *sd_trans_gl;
	struct mutex sd_invalidate_inodes_mutex;

	/* Inode Stuff */

	struct inode *sd_master_dir;
	struct inode *sd_jindex;
	struct inode *sd_inum_inode;
	struct inode *sd_statfs_inode;
	struct inode *sd_ir_inode;
	struct inode *sd_sc_inode;
	struct inode *sd_ut_inode;
	struct inode *sd_qc_inode;
	struct inode *sd_rindex;
	struct inode *sd_quota_inode;

	/* Inum stuff */

	struct mutex sd_inum_mutex;

	/* StatFS stuff */

	spinlock_t sd_statfs_spin;
	struct mutex sd_statfs_mutex;
	struct gfs2_statfs_change sd_statfs_master;
	struct gfs2_statfs_change sd_statfs_local;
	unsigned long sd_statfs_sync_time;

	/* Resource group stuff */

	uint64_t sd_rindex_vn;
	spinlock_t sd_rindex_spin;
	struct mutex sd_rindex_mutex;
	struct list_head sd_rindex_list;
	struct list_head sd_rindex_mru_list;
	struct list_head sd_rindex_recent_list;
	struct gfs2_rgrpd *sd_rindex_forward;
	unsigned int sd_rgrps;

	/* Journal index stuff */

	struct list_head sd_jindex_list;
	spinlock_t sd_jindex_spin;
	struct mutex sd_jindex_mutex;
	unsigned int sd_journals;
	unsigned long sd_jindex_refresh_time;

	struct gfs2_jdesc *sd_jdesc;
	struct gfs2_holder sd_journal_gh;
	struct gfs2_holder sd_jinode_gh;

	struct gfs2_holder sd_ir_gh;
	struct gfs2_holder sd_sc_gh;
	struct gfs2_holder sd_ut_gh;
	struct gfs2_holder sd_qc_gh;

	/* Daemon stuff */

	struct task_struct *sd_scand_process;
	struct task_struct *sd_recoverd_process;
	struct task_struct *sd_logd_process;
	struct task_struct *sd_quotad_process;
	struct task_struct *sd_inoded_process;
	struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
	unsigned int sd_glockd_num;

	/* Unlinked inode stuff */

	struct list_head sd_unlinked_list;
	atomic_t sd_unlinked_count;
	spinlock_t sd_unlinked_spin;
	struct mutex sd_unlinked_mutex;

	unsigned int sd_unlinked_slots;
	unsigned int sd_unlinked_chunks;
	unsigned char **sd_unlinked_bitmap;

	/* Quota stuff */

	struct list_head sd_quota_list;
	atomic_t sd_quota_count;
	spinlock_t sd_quota_spin;
	struct mutex sd_quota_mutex;

	unsigned int sd_quota_slots;
	unsigned int sd_quota_chunks;
	unsigned char **sd_quota_bitmap;

	uint64_t sd_quota_sync_gen;
	unsigned long sd_quota_sync_time;

	/* Log stuff */

	spinlock_t sd_log_lock;

	unsigned int sd_log_blks_reserved;
	unsigned int sd_log_commited_buf;
	unsigned int sd_log_commited_revoke;

	unsigned int sd_log_num_gl;
	unsigned int sd_log_num_buf;
	unsigned int sd_log_num_revoke;
	unsigned int sd_log_num_rg;
	unsigned int sd_log_num_databuf;
	unsigned int sd_log_num_jdata;

	struct list_head sd_log_le_gl;
	struct list_head sd_log_le_buf;
	struct list_head sd_log_le_revoke;
	struct list_head sd_log_le_rg;
	struct list_head sd_log_le_databuf;

	unsigned int sd_log_blks_free;
	struct mutex sd_log_reserve_mutex;

	uint64_t sd_log_sequence;
	unsigned int sd_log_head;
	unsigned int sd_log_tail;
	uint64_t sd_log_wraps;
	int sd_log_idle;

	unsigned long sd_log_flush_time;
	struct rw_semaphore sd_log_flush_lock;
	struct list_head sd_log_flush_list;

	unsigned int sd_log_flush_head;
	uint64_t sd_log_flush_wrapped;

	struct list_head sd_ail1_list;
	struct list_head sd_ail2_list;
	uint64_t sd_ail_sync_gen;

	/* Replay stuff */

	struct list_head sd_revoke_list;
	unsigned int sd_replay_tail;

	unsigned int sd_found_blocks;
	unsigned int sd_found_revokes;
	unsigned int sd_replayed_blocks;

	/* For quiescing the filesystem */

	struct gfs2_holder sd_freeze_gh;
	struct mutex sd_freeze_lock;
	unsigned int sd_freeze_count;

	/* Counters */

	atomic_t sd_glock_count;
	atomic_t sd_glock_held_count;
	atomic_t sd_inode_count;
	atomic_t sd_reclaimed;

	char sd_fsname[GFS2_FSNAME_LEN];
	char sd_table_name[GFS2_FSNAME_LEN];
	char sd_proto_name[GFS2_FSNAME_LEN];

	/* Debugging crud */

	unsigned long sd_last_warning;
};

#endif /* __INCORE_DOT_H__ */
Commit	Line	Data
b3b94faa DT	1	/*
	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
	3	* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
	4	*
	5	* This copyrighted material is made available to anyone wishing to use,
	6	* modify, copy, or redistribute it subject to the terms and conditions
	7	* of the GNU General Public License v.2.
	8	*/
	9
	10	#ifndef __INCORE_DOT_H__
	11	#define __INCORE_DOT_H__
	12
	13	#define DIO_FORCE 0x00000001
	14	#define DIO_CLEAN 0x00000002
	15	#define DIO_DIRTY 0x00000004
	16	#define DIO_START 0x00000008
	17	#define DIO_WAIT 0x00000010
	18	#define DIO_METADATA 0x00000020
	19	#define DIO_DATA 0x00000040
	20	#define DIO_RELEASE 0x00000080
	21	#define DIO_ALL 0x00000100
	22
	23	struct gfs2_log_operations;
	24	struct gfs2_log_element;
	25	struct gfs2_bitmap;
	26	struct gfs2_rgrpd;
	27	struct gfs2_bufdata;
b3b94faa DT	28	struct gfs2_glock_operations;
	29	struct gfs2_holder;
	30	struct gfs2_glock;
	31	struct gfs2_alloc;
	32	struct gfs2_inode;
	33	struct gfs2_file;
	34	struct gfs2_revoke;
	35	struct gfs2_revoke_replay;
	36	struct gfs2_unlinked;
	37	struct gfs2_quota_data;
	38	struct gfs2_log_buf;
	39	struct gfs2_trans;
	40	struct gfs2_ail;
	41	struct gfs2_jdesc;
	42	struct gfs2_args;
	43	struct gfs2_tune;
	44	struct gfs2_gl_hash_bucket;
	45	struct gfs2_sbd;
	46
	47	typedef void (gfs2_glop_bh_t) (struct gfs2_glock gl, unsigned int ret);
	48
	49	/*
	50	* Structure of operations that are associated with each
	51	* type of element in the log.
	52	*/
	53
	54	struct gfs2_log_operations {
	55	void (lo_add) (struct gfs2_sbd sdp, struct gfs2_log_element *le);
	56	void (lo_incore_commit) (struct gfs2_sbd sdp, struct gfs2_trans *tr);
	57	void (lo_before_commit) (struct gfs2_sbd sdp);
	58	void (lo_after_commit) (struct gfs2_sbd sdp, struct gfs2_ail *ai);
	59	void (lo_before_scan) (struct gfs2_jdesc jd,
	60	struct gfs2_log_header *head, int pass);
	61	int (lo_scan_elements) (struct gfs2_jdesc jd, unsigned int start,
	62	struct gfs2_log_descriptor ld, __be64 ptr,
	63	int pass);
	64	void (lo_after_scan) (struct gfs2_jdesc jd, int error, int pass);
	65	char *lo_name;
	66	};
	67
	68	struct gfs2_log_element {
	69	struct list_head le_list;
	70	struct gfs2_log_operations *le_ops;
	71	};
	72
	73	struct gfs2_bitmap {
	74	struct buffer_head *bi_bh;
	75	char *bi_clone;
	76	uint32_t bi_offset;
	77	uint32_t bi_start;
	78	uint32_t bi_len;
	79	};
	80
	81	struct gfs2_rgrpd {
	82	struct list_head rd_list; /* Link with superblock */
	83	struct list_head rd_list_mru;
	84	struct list_head rd_recent; /* Recently used rgrps */
	85	struct gfs2_glock rd_gl; / Glock for this rgrp */
	86	struct gfs2_rindex rd_ri;
	87	struct gfs2_rgrp rd_rg;
	88	uint64_t rd_rg_vn;
	89	struct gfs2_bitmap *rd_bits;
	90	unsigned int rd_bh_count;
f55ab26a	91	struct mutex rd_mutex;
b3b94faa DT	92	uint32_t rd_free_clone;
	93	struct gfs2_log_element rd_le;
	94	uint32_t rd_last_alloc_data;
	95	uint32_t rd_last_alloc_meta;
	96	struct gfs2_sbd *rd_sbd;
	97	};
	98
	99	enum gfs2_state_bits {
	100	BH_Pinned = BH_PrivateStart,
f42faf4f	101	BH_Escaped = BH_PrivateStart + 1,
b3b94faa DT	102	};
	103
	104	BUFFER_FNS(Pinned, pinned)
	105	TAS_BUFFER_FNS(Pinned, pinned)
f42faf4f SW	106	BUFFER_FNS(Escaped, escaped)
f42faf4f SW	107	TAS_BUFFER_FNS(Escaped, escaped)
b3b94faa DT	108
	109	struct gfs2_bufdata {
	110	struct buffer_head *bd_bh;
	111	struct gfs2_glock *bd_gl;
	112
	113	struct list_head bd_list_tr;
	114	struct gfs2_log_element bd_le;
	115
	116	struct gfs2_ail *bd_ail;
	117	struct list_head bd_ail_st_list;
	118	struct list_head bd_ail_gl_list;
	119	};
	120
b3b94faa DT	121	struct gfs2_glock_operations {
	122	void (go_xmote_th) (struct gfs2_glock gl, unsigned int state,
	123	int flags);
	124	void (go_xmote_bh) (struct gfs2_glock gl);
	125	void (go_drop_th) (struct gfs2_glock gl);
	126	void (go_drop_bh) (struct gfs2_glock gl);
	127	void (go_sync) (struct gfs2_glock gl, int flags);
	128	void (go_inval) (struct gfs2_glock gl, int flags);
	129	int (go_demote_ok) (struct gfs2_glock gl);
	130	int (go_lock) (struct gfs2_holder gh);
	131	void (go_unlock) (struct gfs2_holder gh);
	132	void (go_callback) (struct gfs2_glock gl, unsigned int state);
	133	void (go_greedy) (struct gfs2_glock gl);
	134	int go_type;
	135	};
	136
	137	enum {
	138	/* Actions */
	139	HIF_MUTEX = 0,
	140	HIF_PROMOTE = 1,
	141	HIF_DEMOTE = 2,
	142	HIF_GREEDY = 3,
	143
	144	/* States */
	145	HIF_ALLOCED = 4,
	146	HIF_DEALLOC = 5,
	147	HIF_HOLDER = 6,
	148	HIF_FIRST = 7,
	149	HIF_RECURSE = 8,
	150	HIF_ABORTED = 9,
	151	};
	152
	153	struct gfs2_holder {
	154	struct list_head gh_list;
	155
	156	struct gfs2_glock *gh_gl;
	157	struct task_struct *gh_owner;
	158	unsigned int gh_state;
	159	int gh_flags;
	160
	161	int gh_error;
	162	unsigned long gh_iflags;
	163	struct completion gh_wait;
	164	};
	165
	166	enum {
	167	GLF_PLUG = 0,
	168	GLF_LOCK = 1,
	169	GLF_STICKY = 2,
	170	GLF_PREFETCH = 3,
	171	GLF_SYNC = 4,
	172	GLF_DIRTY = 5,
	173	GLF_SKIP_WAITERS2 = 6,
	174	GLF_GREEDY = 7,
	175	};
	176
	177	struct gfs2_glock {
	178	struct list_head gl_list;
	179	unsigned long gl_flags; /* GLF_... */
	180	struct lm_lockname gl_name;
	181	struct kref gl_ref;
	182
	183	spinlock_t gl_spin;
	184
185	unsigned int gl_state;
186	struct list_head gl_holders;
187	struct list_head gl_waiters1; /* HIF_MUTEX */
188	struct list_head gl_waiters2; /* HIF_DEMOTE, HIF_GREEDY */
189	struct list_head gl_waiters3; /* HIF_PROMOTE */
190
191	struct gfs2_glock_operations *gl_ops;
192
193	struct gfs2_holder *gl_req_gh;
194	gfs2_glop_bh_t gl_req_bh;
195
196	lm_lock_t *gl_lock;
197	char *gl_lvb;
198	atomic_t gl_lvb_count;
199
200	uint64_t gl_vn;
201	unsigned long gl_stamp;
202	void *gl_object;
203
204	struct gfs2_gl_hash_bucket *gl_bucket;
205	struct list_head gl_reclaim;
206
207	struct gfs2_sbd *gl_sbd;
208
209	struct inode *gl_aspace;
210	struct gfs2_log_element gl_le;
211	struct list_head gl_ail_list;
212	atomic_t gl_ail_count;
213	};
214
215	struct gfs2_alloc {
216	/* Quota stuff */
217
218	unsigned int al_qd_num;
219	struct gfs2_quota_data *al_qd[4];
220	struct gfs2_holder al_qd_ghs[4];
221
222	/* Filled in by the caller to gfs2_inplace_reserve() */
223
224	uint32_t al_requested;
225
226	/* Filled in by gfs2_inplace_reserve() */
227
228	char *al_file;
229	unsigned int al_line;
230	struct gfs2_holder al_ri_gh;
231	struct gfs2_holder al_rgd_gh;
232	struct gfs2_rgrpd *al_rgd;
233
234	/* Filled in by gfs2_alloc_() /
235
236	uint32_t al_alloced;
237	};
238
239	enum {
240	GIF_MIN_INIT = 0,
241	GIF_QD_LOCKED = 1,
242	GIF_PAGED = 2,
243	GIF_SW_PAGED = 3,
244	};
245
246	struct gfs2_inode {
247	struct gfs2_inum i_num;
248
249	atomic_t i_count;
250	unsigned long i_flags; /* GIF_... */
251
252	uint64_t i_vn;
253	struct gfs2_dinode i_di;
254
255	struct gfs2_glock *i_gl;
256	struct gfs2_sbd *i_sbd;
257	struct inode *i_vnode;
258
259	struct gfs2_holder i_iopen_gh;
f42faf4f	260	struct gfs2_holder i_gh; /* for prepare/commit_write only */
b3b94faa DT	261	struct gfs2_alloc i_alloc;
	262	uint64_t i_last_rg_alloc;
	263
	264	spinlock_t i_spin;
	265	struct rw_semaphore i_rw_mutex;
	266
	267	unsigned int i_greedy;
	268	unsigned long i_last_pfault;
	269
	270	struct buffer_head *i_cache[GFS2_MAX_META_HEIGHT];
	271	};
	272
	273	enum {
	274	GFF_DID_DIRECT_ALLOC = 0,
	275	};
	276
	277	struct gfs2_file {
	278	unsigned long f_flags; /* GFF_... */
	279
f55ab26a	280	struct mutex f_fl_mutex;
b3b94faa DT	281	struct gfs2_holder f_fl_gh;
	282
	283	struct gfs2_inode *f_inode;
	284	struct file *f_vfile;
	285	};
	286
	287	struct gfs2_revoke {
	288	struct gfs2_log_element rv_le;
	289	uint64_t rv_blkno;
	290	};
	291
	292	struct gfs2_revoke_replay {
	293	struct list_head rr_list;
	294	uint64_t rr_blkno;
	295	unsigned int rr_where;
	296	};
	297
	298	enum {
	299	ULF_LOCKED = 0,
	300	};
	301
	302	struct gfs2_unlinked {
	303	struct list_head ul_list;
	304	unsigned int ul_count;
	305	struct gfs2_unlinked_tag ul_ut;
	306	unsigned long ul_flags; /* ULF_... */
	307	unsigned int ul_slot;
	308	};
	309
	310	enum {
	311	QDF_USER = 0,
	312	QDF_CHANGE = 1,
	313	QDF_LOCKED = 2,
	314	};
	315
5c676f6d SW	316	struct gfs2_quota_lvb {
	317	uint32_t qb_magic;
	318	uint32_t __pad;
	319	uint64_t qb_limit; /* Hard limit of # blocks to alloc */
	320	uint64_t qb_warn; /* Warn user when alloc is above this # */
	321	int64_t qb_value; /* Current # blocks allocated */
	322	};
	323
b3b94faa DT	324	struct gfs2_quota_data {
	325	struct list_head qd_list;
	326	unsigned int qd_count;
	327
	328	uint32_t qd_id;
	329	unsigned long qd_flags; /* QDF_... */
	330
	331	int64_t qd_change;
	332	int64_t qd_change_sync;
	333
	334	unsigned int qd_slot;
	335	unsigned int qd_slot_count;
	336
	337	struct buffer_head *qd_bh;
	338	struct gfs2_quota_change *qd_bh_qc;
	339	unsigned int qd_bh_count;
	340
	341	struct gfs2_glock *qd_gl;
	342	struct gfs2_quota_lvb qd_qb;
	343
	344	uint64_t qd_sync_gen;
	345	unsigned long qd_last_warn;
	346	unsigned long qd_last_touched;
	347	};
	348
	349	struct gfs2_log_buf {
	350	struct list_head lb_list;
	351	struct buffer_head *lb_bh;
	352	struct buffer_head *lb_real;
	353	};
	354
	355	struct gfs2_trans {
	356	char *tr_file;
	357	unsigned int tr_line;
	358
	359	unsigned int tr_blocks;
	360	unsigned int tr_revokes;
	361	unsigned int tr_reserved;
	362
e317ffcb	363	struct gfs2_holder tr_t_gh;
b3b94faa DT	364
	365	int tr_touched;
	366
	367	unsigned int tr_num_buf;
	368	unsigned int tr_num_buf_new;
	369	unsigned int tr_num_buf_rm;
	370	struct list_head tr_list_buf;
	371
	372	unsigned int tr_num_revoke;
	373	unsigned int tr_num_revoke_rm;
	374	};
	375
	376	struct gfs2_ail {
	377	struct list_head ai_list;
	378
	379	unsigned int ai_first;
	380	struct list_head ai_ail1_list;
	381	struct list_head ai_ail2_list;
	382
	383	uint64_t ai_sync_gen;
	384	};
	385
	386	struct gfs2_jdesc {
	387	struct list_head jd_list;
	388
7359a19c	389	struct inode *jd_inode;
b3b94faa DT	390	unsigned int jd_jid;
	391	int jd_dirty;
	392
	393	unsigned int jd_blocks;
	394	};
	395
	396	#define GFS2_GLOCKD_DEFAULT 1
	397	#define GFS2_GLOCKD_MAX 16
	398
	399	#define GFS2_QUOTA_DEFAULT GFS2_QUOTA_OFF
	400	#define GFS2_QUOTA_OFF 0
	401	#define GFS2_QUOTA_ACCOUNT 1
	402	#define GFS2_QUOTA_ON 2
	403
	404	#define GFS2_DATA_DEFAULT GFS2_DATA_ORDERED
	405	#define GFS2_DATA_WRITEBACK 1
	406	#define GFS2_DATA_ORDERED 2
	407
	408	struct gfs2_args {
	409	char ar_lockproto[GFS2_LOCKNAME_LEN]; /* Name of the Lock Protocol */
	410	char ar_locktable[GFS2_LOCKNAME_LEN]; /* Name of the Lock Table */
	411	char ar_hostdata[GFS2_LOCKNAME_LEN]; /* Host specific data */
	412	int ar_spectator; /* Don't get a journal because we're always RO */
	413	int ar_ignore_local_fs; /* Don't optimize even if local_fs is 1 */
	414	int ar_localflocks; /* Let the VFS do flock\|fcntl locks for us */
	415	int ar_localcaching; /* Local-style caching (dangerous on multihost) */
	416	int ar_debug; /* Oops on errors instead of trying to be graceful */
	417	int ar_upgrade; /* Upgrade ondisk/multihost format */
	418	unsigned int ar_num_glockd; /* Number of glockd threads */
	419	int ar_posix_acl; /* Enable posix acls */
	420	int ar_quota; /* off/account/on */
	421	int ar_suiddir; /* suiddir support */
	422	int ar_data; /* ordered/writeback */
	423	};
	424
	425	struct gfs2_tune {
	426	spinlock_t gt_spin;
	427
	428	unsigned int gt_ilimit;
	429	unsigned int gt_ilimit_tries;
	430	unsigned int gt_ilimit_min;
	431	unsigned int gt_demote_secs; /* Cache retention for unheld glock */
	432	unsigned int gt_incore_log_blocks;
	433	unsigned int gt_log_flush_secs;
	434	unsigned int gt_jindex_refresh_secs; /* Check for new journal index */
	435
	436	unsigned int gt_scand_secs;
	437	unsigned int gt_recoverd_secs;
	438	unsigned int gt_logd_secs;
	439	unsigned int gt_quotad_secs;
	440	unsigned int gt_inoded_secs;
	441
	442	unsigned int gt_quota_simul_sync; /* Max quotavals to sync at once */
	443	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
	444	unsigned int gt_quota_scale_num; /* Numerator */
	445	unsigned int gt_quota_scale_den; /* Denominator */
	446	unsigned int gt_quota_cache_secs;
	447	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
	448	unsigned int gt_atime_quantum; /* Min secs between atime updates */
	449	unsigned int gt_new_files_jdata;
	450	unsigned int gt_new_files_directio;
	451	unsigned int gt_max_atomic_write; /* Split big writes into this size */
	452	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
	453	unsigned int gt_lockdump_size;
454	unsigned int gt_stall_secs; /* Detects trouble! */
455	unsigned int gt_complain_secs;
456	unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
457	unsigned int gt_entries_per_readdir;
458	unsigned int gt_prefetch_secs; /* Usage window for prefetched glocks */
459	unsigned int gt_greedy_default;
460	unsigned int gt_greedy_quantum;
461	unsigned int gt_greedy_max;
462	unsigned int gt_statfs_quantum;
463	unsigned int gt_statfs_slow;
464	};
465
466	struct gfs2_gl_hash_bucket {
467	rwlock_t hb_lock;
468	struct list_head hb_list;
469	};
470
471	enum {
472	SDF_JOURNAL_CHECKED = 0,
473	SDF_JOURNAL_LIVE = 1,
474	SDF_SHUTDOWN = 2,
475	SDF_NOATIME = 3,
476	};
477
478	#define GFS2_GL_HASH_SHIFT 13
479	#define GFS2_GL_HASH_SIZE (1 << GFS2_GL_HASH_SHIFT)
480	#define GFS2_GL_HASH_MASK (GFS2_GL_HASH_SIZE - 1)
481	#define GFS2_FSNAME_LEN 256
482
483	struct gfs2_sbd {
484	struct super_block *sd_vfs;
485	struct kobject sd_kobj;
486	unsigned long sd_flags; /* SDF_... */
487	struct gfs2_sb sd_sb;
488
489	/* Constants computed on mount */
490
491	uint32_t sd_fsb2bb;
492	uint32_t sd_fsb2bb_shift;
493	uint32_t sd_diptrs; /* Number of pointers in a dinode */
494	uint32_t sd_inptrs; /* Number of pointers in a indirect block */
495	uint32_t sd_jbsize; /* Size of a journaled data block */
496	uint32_t sd_hash_bsize; /* sizeof(exhash block) */
497	uint32_t sd_hash_bsize_shift;
498	uint32_t sd_hash_ptrs; /* Number of pointers in a hash block */
499	uint32_t sd_ut_per_block;
500	uint32_t sd_qc_per_block;
501	uint32_t sd_max_dirres; /* Max blocks needed to add a directory entry */
502	uint32_t sd_max_height; /* Max height of a file's metadata tree */
503	uint64_t sd_heightsize[GFS2_MAX_META_HEIGHT];
504	uint32_t sd_max_jheight; /* Max height of journaled file's meta tree */
505	uint64_t sd_jheightsize[GFS2_MAX_META_HEIGHT];
506
507	struct gfs2_args sd_args; /* Mount arguments */
508	struct gfs2_tune sd_tune; /* Filesystem tuning structure */
509
510	/* Lock Stuff */
511
512	struct lm_lockstruct sd_lockstruct;
513	struct gfs2_gl_hash_bucket sd_gl_hash[GFS2_GL_HASH_SIZE];
514	struct list_head sd_reclaim_list;
515	spinlock_t sd_reclaim_lock;
516	wait_queue_head_t sd_reclaim_wq;
517	atomic_t sd_reclaim_count;
518	struct gfs2_holder sd_live_gh;
519	struct gfs2_glock *sd_rename_gl;
520	struct gfs2_glock *sd_trans_gl;
f55ab26a	521	struct mutex sd_invalidate_inodes_mutex;
b3b94faa DT	522
	523	/* Inode Stuff */
	524
f42faf4f SW	525	struct inode *sd_master_dir;
	526	struct inode *sd_jindex;
	527	struct inode *sd_inum_inode;
	528	struct inode *sd_statfs_inode;
	529	struct inode *sd_ir_inode;
	530	struct inode *sd_sc_inode;
	531	struct inode *sd_ut_inode;
	532	struct inode *sd_qc_inode;
	533	struct inode *sd_rindex;
	534	struct inode *sd_quota_inode;
b3b94faa DT	535
	536	/* Inum stuff */
	537
f55ab26a	538	struct mutex sd_inum_mutex;
b3b94faa DT	539
	540	/* StatFS stuff */
	541
	542	spinlock_t sd_statfs_spin;
f55ab26a	543	struct mutex sd_statfs_mutex;
b3b94faa DT	544	struct gfs2_statfs_change sd_statfs_master;
	545	struct gfs2_statfs_change sd_statfs_local;
	546	unsigned long sd_statfs_sync_time;
	547
	548	/* Resource group stuff */
	549
	550	uint64_t sd_rindex_vn;
	551	spinlock_t sd_rindex_spin;
f55ab26a	552	struct mutex sd_rindex_mutex;
b3b94faa DT	553	struct list_head sd_rindex_list;
	554	struct list_head sd_rindex_mru_list;
	555	struct list_head sd_rindex_recent_list;
	556	struct gfs2_rgrpd *sd_rindex_forward;
	557	unsigned int sd_rgrps;
	558
	559	/* Journal index stuff */
	560
	561	struct list_head sd_jindex_list;
	562	spinlock_t sd_jindex_spin;
f55ab26a	563	struct mutex sd_jindex_mutex;
b3b94faa DT	564	unsigned int sd_journals;
	565	unsigned long sd_jindex_refresh_time;
	566
	567	struct gfs2_jdesc *sd_jdesc;
	568	struct gfs2_holder sd_journal_gh;
	569	struct gfs2_holder sd_jinode_gh;
	570
	571	struct gfs2_holder sd_ir_gh;
	572	struct gfs2_holder sd_sc_gh;
	573	struct gfs2_holder sd_ut_gh;
	574	struct gfs2_holder sd_qc_gh;
	575
	576	/* Daemon stuff */
	577
	578	struct task_struct *sd_scand_process;
	579	struct task_struct *sd_recoverd_process;
	580	struct task_struct *sd_logd_process;
	581	struct task_struct *sd_quotad_process;
	582	struct task_struct *sd_inoded_process;
	583	struct task_struct *sd_glockd_process[GFS2_GLOCKD_MAX];
	584	unsigned int sd_glockd_num;
	585
	586	/* Unlinked inode stuff */
	587
	588	struct list_head sd_unlinked_list;
	589	atomic_t sd_unlinked_count;
	590	spinlock_t sd_unlinked_spin;
f55ab26a	591	struct mutex sd_unlinked_mutex;
b3b94faa DT	592
	593	unsigned int sd_unlinked_slots;
	594	unsigned int sd_unlinked_chunks;
	595	unsigned char **sd_unlinked_bitmap;
	596
	597	/* Quota stuff */
	598
	599	struct list_head sd_quota_list;
	600	atomic_t sd_quota_count;
	601	spinlock_t sd_quota_spin;
f55ab26a	602	struct mutex sd_quota_mutex;
b3b94faa DT	603
	604	unsigned int sd_quota_slots;
	605	unsigned int sd_quota_chunks;
	606	unsigned char **sd_quota_bitmap;
	607
	608	uint64_t sd_quota_sync_gen;
	609	unsigned long sd_quota_sync_time;
	610
	611	/* Log stuff */
	612
	613	spinlock_t sd_log_lock;
b3b94faa DT	614
	615	unsigned int sd_log_blks_reserved;
	616	unsigned int sd_log_commited_buf;
	617	unsigned int sd_log_commited_revoke;
	618
	619	unsigned int sd_log_num_gl;
	620	unsigned int sd_log_num_buf;
	621	unsigned int sd_log_num_revoke;
	622	unsigned int sd_log_num_rg;
	623	unsigned int sd_log_num_databuf;
f42faf4f SW	624	unsigned int sd_log_num_jdata;
f42faf4f SW	625
b3b94faa DT	626	struct list_head sd_log_le_gl;
	627	struct list_head sd_log_le_buf;
	628	struct list_head sd_log_le_revoke;
	629	struct list_head sd_log_le_rg;
	630	struct list_head sd_log_le_databuf;
	631
	632	unsigned int sd_log_blks_free;
71b86f56	633	struct mutex sd_log_reserve_mutex;
b3b94faa DT	634
	635	uint64_t sd_log_sequence;
	636	unsigned int sd_log_head;
	637	unsigned int sd_log_tail;
	638	uint64_t sd_log_wraps;
	639	int sd_log_idle;
	640
	641	unsigned long sd_log_flush_time;
484adff8	642	struct rw_semaphore sd_log_flush_lock;
b3b94faa DT	643	struct list_head sd_log_flush_list;
	644
	645	unsigned int sd_log_flush_head;
	646	uint64_t sd_log_flush_wrapped;
	647
	648	struct list_head sd_ail1_list;
	649	struct list_head sd_ail2_list;
	650	uint64_t sd_ail_sync_gen;
	651
	652	/* Replay stuff */
	653
	654	struct list_head sd_revoke_list;
	655	unsigned int sd_replay_tail;
	656
	657	unsigned int sd_found_blocks;
	658	unsigned int sd_found_revokes;
	659	unsigned int sd_replayed_blocks;
	660
	661	/* For quiescing the filesystem */
	662
	663	struct gfs2_holder sd_freeze_gh;
f55ab26a	664	struct mutex sd_freeze_lock;
b3b94faa DT	665	unsigned int sd_freeze_count;
	666
	667	/* Counters */
	668
	669	atomic_t sd_glock_count;
	670	atomic_t sd_glock_held_count;
	671	atomic_t sd_inode_count;
b3b94faa	672	atomic_t sd_reclaimed;
b3b94faa DT	673
	674	char sd_fsname[GFS2_FSNAME_LEN];
	675	char sd_table_name[GFS2_FSNAME_LEN];
	676	char sd_proto_name[GFS2_FSNAME_LEN];
	677
	678	/* Debugging crud */
	679
	680	unsigned long sd_last_warning;
	681	};
	682
	683	#endif /* __INCORE_DOT_H__ */
	684